Starting with version 14.2, it is possible to use the built-in functionality instead (set the ASPxUploadControl.AutoStartUpload property to True).
The following approach can be used to force the ASPxUploadControl to upload a selected file automatically:
1) Handle the ASPxClientUploadControl.TextChanged event, which is raised on the client side when the text within the control's edit box is changed while the control has focus;
2) Call the ASPxClientUploadControl.Upload method to initiate uploading a specified file(s) to the web server's memory.
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OBSOLETE - How to force the ASPxUploadControl to upload a selected file(s) automatically
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